The latest link I can find is from last may and that's Beta 1. Did Microsoft give up on this? I realize they are just basically MSBuild templates, but curious nonetheless.
I hope they're not still alive.
We probably used them improperly so it's probably our own fault, but they caused us huge issues when we wanted to update just a portion of our site. The supposed benefits of using web site deployment projects never paid off for us and just caused more problems than they were worth.
Edit
Drats. They're still alive.